作　　者： ; ; ; ; ;

机构地区： 西北农林科技大学园艺学院农业部西北园艺植物种质资源与遗传改良重点开放实验室

出　　处： 《西北农业学报》 2009年第5期297-301,共5页

摘　　要： 为了解番茄种质资源的遗传多样性，对50份来自不同国家和地区番茄育种材料的22个性状进行了鉴定分析。结果表明，22个性状的变异系数在12．06％～62．26％之间，最大的是成熟果实番茄红素含量，为62．26％，其次是单果质量，为42．13％，最小的是第二花序节位，为12．06％。50份材料通过聚类分析划分为4大类群，第1类群的商品果纵径、商品果横径、首花节位、果梗洼大小、可溶性固形物含量最高；第Ⅱ类群的首花节位最低，果形指数、果实硬度、番茄红素含量最小；单果质量最大；第Ⅲ类群的叶片长、叶片宽、第二花序节位、果肉厚、单花序花数、单花序果数等性状表现最高；第Ⅳ类群的叶片长、叶片宽、果柄长度、果肉厚、果梗洼大小、心室数、单果质量最小，果形指数和番茄红素含量最高。聚类分析发现，29号、30号、22号、7号4个材料性状表现突出，具有一定的利用价值，可用于番茄品种的遗传改良。 22 traits were measured to study the genetic diversity of 50 tomato germplasm resources from different countries and regions. The results showed that the variation coefficient of the 22 traits ranged from 12.06% to 62.26% among the 50 materials. Lycopene content had the greatest coefficient variation of 62.26%, weight per fruit was the next of 42.13%, and the leaf node below the second inflorescence was the smallest of 12.06%. 4 groups were classified of the 50 materials by cluster analysis on the 22 traits. Group Ⅰ had the highest longitudinal diameter of fruit, transverse diameter of fruit, the leaf node below the first inflorescence, size of eordy area around pedicel scar, soluble solids content. Group Ⅱ had the lowest fruit shape index, fruit hardness, lycopene content and the leaf node below the first inflorescence, but the highest weight per fruit. Group Ⅲ had the highest leaf length, leaf width, the leaf node below the seeond inflorescence, flesh thickness, number of flowers per inflorescence and number of fruits per inflorescence. Group Ⅳ had the lowest leaf length, leaf width , pedicel length, flesh thickness, size of cordy area around pedicel scar, number of loeules, weight per fruit. , but the highest fruit shape index and lycopene content. The materials coded as No. 29, No. 30, No. 22, No. 7 were found with some favorable traits from the 4 groups which could be used for improvement of tomato varieties.

关 键 词： 番茄 种质资源 遗传多样性 聚类分析

领　　域： [农业科学] [农业科学]